Potassium (K), atomic number 19, will most likely react with which of the following elements? odium, (Na), because it is in the same column
odium, (Na), because it is in the same column

Calcium (Ca), because it is in the same row.
Calcium (Ca), because it is in the same row.

Chlorine (Cl), because it is a nonmetal
Chlorine (Cl), because it is a nonmetal

Argon (Ar), because it is a noble gas

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.